US3911713A - Method of rolling metal sheet articles - Google Patents
Method of rolling metal sheet articles Download PDFInfo
- Publication number
- US3911713A US3911713A US373301A US37330173A US3911713A US 3911713 A US3911713 A US 3911713A US 373301 A US373301 A US 373301A US 37330173 A US37330173 A US 37330173A US 3911713 A US3911713 A US 3911713A
- Authority
- US
- United States
- Prior art keywords
- rolls
- article
- pair
- rolling
- peripheral speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
- B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/222—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a rolling-drawing process; in a multi-pass mill
Definitions
- ABS IRACT A method of rolling metal sheet articles between the driving rolls, in which the rolls of an adjacent pair are rotated in opposite directions at different peripheral speeds, with tensile forces being applied to the input and output portions of the article by successively enveloping the rolls by the article, at ratios of the peripheral speeds of the rolls equal to the ratios of the thicknesses of the article before and after the rolling in the pair of adjacent rolls and at a speed of movement of the output portion of the article equal to the peripheral speed of the roll rotating at a higher peripheral speed, while maintaining a constant pressure on the rolls regardless of any change in the distance therebetween.
- the present invention relates to a method of rolling metal sheet articles such as strips, bands, sheets, and foil, preferably in a cold state.
- the rolling mill is adjusted for predetermined reduction by means of a special screwdown arrangement used for setting the rolls into a required position.
- the screwdown arrangement of the mill with a mechanical or electrical drive of the screw housings is complicated and requires high precision in its manufacture. Furthermore, said screwdown arrangement complicates the control of the rolling operation.
- 3,253,445 consisting in elongating an article between the adjacent rolls rotating in opposite directions at different peripheral speeds and at a pressure on the contact surface of the rolls with said article smaller than that required for plastic deformation of the article.
- the reduction of the article by means of rolls is not provided for under this method.
- An object of the present invention is to provide a method of rolling metal sheet articles, making it possible to produce accurately sized sheet articles with the self-setting of the rolls into a predetermined position.
- the above and other objects of the invention are accomplished by providing a method of rolling metal sheet articles by way of reduction said article between the driving rolls, which involves the steps of: imparting to a pair of adjacent rolls, the rotation from individual motors or with the aid of mechanical transmission means from one motor, in opposite directions at different peripheral speeds; applying, to the input and output portions of the article, tensile forces smaller than a force required fora plastic deformation of the article, by way of successive enveloping of the rolls of said pair by the drawn article at equal ratios of the peripheral speeds of the rolls and the thicknesses of the article before and after the rolling in the pair of adjacent rolls and at a speed of movement of the output portion of the article equal to the peripheral speed of the roll rotating at a higher peripheral speed.
- the rolling operation is carried out by maintaining a constant pressure on the rolls by a hydraulic pressure head, sufficient for the plastic deformation of the article by way of its reduction with the rolls, which permits attaining the required deformation regardless of any change in the distance between said rolls.
- the present invention thus provides a method of rolling metal sheet articles between the driving rolls, which makes it possible to obtain sheet articles of uniform thickness without using complex screwdown arrangements and without any preliminary adjustment of a gap between the rolls.
- FIG. 1 illustrates apparatus used in a method of rolling metal sheet articles between the driving rolls according to the invention
- FIG. 2 illustrates a diagram of a hydraulic cylinder in the working stand of the rolling mill.
- rolls 1 and 2 are retated by drives (not shown) in opposite directions (shown with arrows) at different peripheral speeds V and. V2.
- the rolls are rotated by individual motors (not shown), which permits, if necessary, to vary the ratio of the rolls rotation speeds over a wide range.
- the rolls may also be actuated with the aid of one motor and a mechanical transmission therefrom, e.g., by means of pinion drives (not shown).
- pinion drives not shown.
- the roll 1 is rotated at a higher peripheral speed than the roll 2.
- the ratio of the peripheral speeds of the rolls 1 and 2 is to be equal to the ratio of the thicknesses of an article m before and after the rolling in the pair of adjacent rolls 1 and 2, i.e.,
- the latter is bent, under tension, around the rolls 1 and 2 so as to utilize forces F and F of static friction on arcs AB and CD of bending rolls 1 and 2'by the article m to forces F a and P a in deformation zone BEDG, which are smaller than the force required for the plastic deformation of the article.
- the static friction is the friction that develops between the article and the roll when said article and roll are moved without slipping.
- FIG. 1 makes it possible to judge the effect of the friction force is within the deformation zone BEDG for the process of deformation; the friction forces '1' on the opposite contact surfaces BE and DG of the deformation zone are equal and act in opposite directions so that the pressure N acting on the rolls at the side of the article m being rolled is considerably reduced (the direction of application of the pressure N is shown with arrows).
- the rolling operation is effected maintaining a constant pressure on the rolls regardless of any change in the distance between the rolls, which permits obtaining the required deformation of the article.
- a required value of pressure on the rolls is preset sufficient for the plastic deformation of the article by its reduction with the rolls.
- the constant pressure on said rolls is maintained by means of a hydraulic pressure head.
- a hydraulic cylinder unit 5 As shown in FIG. 2, provided between pads 3 of the upper roll 1 and a frame 4, there is installed a hydraulic cylinder unit 5.
- the pressure N on the rolls is created by feeding liquid under pressure p to the hydraulic cylinder unit 5 (the direction of feeding is shown with arrow) by means of a hydraulic accumulator (not shown).
- the pressure N from the hydraulic cylinder 5 is transmitted to the rolls 1 and 2 between which said article m is being rolled.
- the thickness h of the input portion of the article m may vary due to the irregularities of the initial thickness.
- the pressure N on the rolls remains unchanged, and the rolls 1 and 2 are moved apart by a distance proportional to the increase in the thickness of the article, while the relative deformation thereof remains constant, i.e.,
- the magnitudes of deviations from the average thickness increase by a factor of 2 to 3.
- the present method of rolling metal sheet articles makes it possible to keep the relative deviations of thickness of a hot-rolled blank constant during cold rolling up to obtaining a finish without using the screwdown arrangements and accurate adjustment of the rolls.
- a method of rolling metal sheet articles by reduction of an article between driving rolls comprising the steps of: imparting to a pair of adjacent rolls the rotation from individual motors in opposite directions at different peripheral speeds; applying to input and output portions of the article tensile forces smaller than a force necessary for the plastic deformation of the article through successive enveloping of the rolls of said pair by means of the article under tension at equal ratios of the peripheral speeds of the rolls and the thicknesses of the article before and after the rolling in the pair of adjacent rolls and at a speed of movement of the output portion of the article equal to the peripheral speed of the roll rotating at a higher peripheral speed; maintaining, by means of a hydraulic head, a required constant pressure on the rolls sufficient for the plastic deformation of the article by way of its reduction with the rolls, which permits attaining the required deformation of said articles regardless of any change in the distance between the above rolls.
- the method of rolling metal sheet articles by reduction of an article between driving rolls comprising the steps of: imparting to the pair of adjacent rolls the rotation with the aid of a mechanical transmission from one motor in opposite directions at different peripheral speeds; applying to input and output portions of the article, tensile forces smaller than a force necessary for the plastic deformation of the article by way of successive enveloping of the rolls of said pair by means of the article under tension at equal ratios of the peripheral speed of the rolls and the thicknesses of the article before and after rolling in the pair of adjacent rolls and at a speed of movement of the output portion of the article equal to the peripheral speed of the roll rotating at a higher peripheral speed; maintaining, by means of a hydraulic head, constant pressure on the rolls, sufficient for the plastic deformation of the article by way of its reduction with the rolls, which permits attaining the required deformation of the article regardless of any change in the distance between the rolls.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7124262A FR2144529B1 (fr) | 1971-06-28 | 1971-07-02 | |
DE19712133057 DE2133057A1 (de) | 1971-06-28 | 1971-07-02 | Verfahren zum walzen von metallblecherzeugnissen |
GB3137671A GB1310340A (en) | 1971-06-28 | 1971-07-05 | Method of rolling metal sheet articles between driving rolls |
US373301A US3911713A (en) | 1971-06-28 | 1973-06-25 | Method of rolling metal sheet articles |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15725771A | 1971-06-28 | 1971-06-28 | |
FR7124262A FR2144529B1 (fr) | 1971-06-28 | 1971-07-02 | |
DE19712133057 DE2133057A1 (de) | 1971-06-28 | 1971-07-02 | Verfahren zum walzen von metallblecherzeugnissen |
GB3137671 | 1971-07-05 | ||
US373301A US3911713A (en) | 1971-06-28 | 1973-06-25 | Method of rolling metal sheet articles |
Publications (1)
Publication Number | Publication Date |
---|---|
US3911713A true US3911713A (en) | 1975-10-14 |
Family
ID=27510174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US373301A Expired - Lifetime US3911713A (en) | 1971-06-28 | 1973-06-25 | Method of rolling metal sheet articles |
Country Status (4)
Country | Link |
---|---|
US (1) | US3911713A (fr) |
DE (1) | DE2133057A1 (fr) |
FR (1) | FR2144529B1 (fr) |
GB (1) | GB1310340A (fr) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4244203A (en) * | 1979-03-29 | 1981-01-13 | Olin Corporation | Cooperative rolling process and apparatus |
US4382375A (en) * | 1980-01-14 | 1983-05-10 | Nippon Steel Corporation | Method of rolling metal strip |
US4412439A (en) * | 1981-05-04 | 1983-11-01 | Olin Corporation | Cooperative rolling mill apparatus and process |
US4414832A (en) * | 1981-09-11 | 1983-11-15 | Olin Corporation | Start-up and steady state process control for cooperative rolling |
US4478064A (en) * | 1982-03-04 | 1984-10-23 | Olin Corporation | Modifications to a cooperative rolling system for increasing _maximum attainable reduction per pass |
US4781050A (en) * | 1982-01-21 | 1988-11-01 | Olin Corporation | Process and apparatus for producing high reduction in soft metal materials |
US20060185169A1 (en) * | 2005-02-23 | 2006-08-24 | Paul Lewis | Methods for manufacturing endodontic instruments |
US20060185170A1 (en) * | 2005-02-23 | 2006-08-24 | Paul Lewis | Methods for manufacturing endodontic instruments from powdered metals |
US20080178684A1 (en) * | 2007-01-29 | 2008-07-31 | Metacure Limited | Method for testing fatigue of a lead |
US20080213720A1 (en) * | 2003-05-13 | 2008-09-04 | Ultradent Products, Inc. | Endodontic instruments manufactured using chemical milling |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2507505B1 (fr) * | 1981-06-15 | 1985-09-27 | Nippon Steel Corp | Procede de laminage d'une bande metallique |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3238756A (en) * | 1961-05-03 | 1966-03-08 | Gen Electric | Material forming method and apparatus |
US3253445A (en) * | 1962-07-09 | 1966-05-31 | Metal Box Co Ltd | Apparatus for rolling strip metal |
US3709017A (en) * | 1969-06-26 | 1973-01-09 | V Vydrin | Method of rolling metal sheet articles between the driven rolls of the roll mill |
-
1971
- 1971-07-02 FR FR7124262A patent/FR2144529B1/fr not_active Expired
- 1971-07-02 DE DE19712133057 patent/DE2133057A1/de not_active Ceased
- 1971-07-05 GB GB3137671A patent/GB1310340A/en not_active Expired
-
1973
- 1973-06-25 US US373301A patent/US3911713A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3238756A (en) * | 1961-05-03 | 1966-03-08 | Gen Electric | Material forming method and apparatus |
US3253445A (en) * | 1962-07-09 | 1966-05-31 | Metal Box Co Ltd | Apparatus for rolling strip metal |
US3709017A (en) * | 1969-06-26 | 1973-01-09 | V Vydrin | Method of rolling metal sheet articles between the driven rolls of the roll mill |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4244203A (en) * | 1979-03-29 | 1981-01-13 | Olin Corporation | Cooperative rolling process and apparatus |
US4382375A (en) * | 1980-01-14 | 1983-05-10 | Nippon Steel Corporation | Method of rolling metal strip |
US4412439A (en) * | 1981-05-04 | 1983-11-01 | Olin Corporation | Cooperative rolling mill apparatus and process |
US4414832A (en) * | 1981-09-11 | 1983-11-15 | Olin Corporation | Start-up and steady state process control for cooperative rolling |
US4781050A (en) * | 1982-01-21 | 1988-11-01 | Olin Corporation | Process and apparatus for producing high reduction in soft metal materials |
US4478064A (en) * | 1982-03-04 | 1984-10-23 | Olin Corporation | Modifications to a cooperative rolling system for increasing _maximum attainable reduction per pass |
US20080213720A1 (en) * | 2003-05-13 | 2008-09-04 | Ultradent Products, Inc. | Endodontic instruments manufactured using chemical milling |
US20060185170A1 (en) * | 2005-02-23 | 2006-08-24 | Paul Lewis | Methods for manufacturing endodontic instruments from powdered metals |
US20060185169A1 (en) * | 2005-02-23 | 2006-08-24 | Paul Lewis | Methods for manufacturing endodontic instruments |
US7665212B2 (en) | 2005-02-23 | 2010-02-23 | Ultradent Products, Inc. | Methods for manufacturing endodontic instruments |
US7743505B2 (en) | 2005-02-23 | 2010-06-29 | Ultradent Products, Inc. | Methods for manufacturing endodontic instruments from powdered metals |
US20080178684A1 (en) * | 2007-01-29 | 2008-07-31 | Metacure Limited | Method for testing fatigue of a lead |
US7926358B2 (en) * | 2007-01-29 | 2011-04-19 | Metacure Limited | Method for testing fatigue of a lead |
Also Published As
Publication number | Publication date |
---|---|
DE2133057A1 (de) | 1973-01-18 |
FR2144529A1 (fr) | 1973-02-16 |
GB1310340A (en) | 1973-03-21 |
FR2144529B1 (fr) | 1974-04-05 |
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